21719789

素因数分解:

$7^3\times {\mathrm{13}}^1\times {\mathrm{4871}}^1$

素因数の和:4905

約数の個数: 16

約数和(自身を含む): 27283200

約数和(自身を除く): 5563411

約数列:

[1, 7, 13, 49, 91, 343, 637, 4459, 4871, 34097, 63323, 238679, 443261, 1670753, 3102827, 21719789]

約数ペア:

[(1, 21719789), (7, 3102827), (13, 1670753), (49, 443261), (91, 238679), (343, 63323), (637, 34097), (4459, 4871)]